Infrared stimulated luminescence in quartz

Infrared (IR, 880nm) stimulated luminescence (IRSL) signal was observed from quartz at room temperature. The characteristics of the signal such as its response to γ-ray irradiation, thermal stability and thermal assistance energy show that the signal originates from different traps than those responsible for the luminescence signal stimulated by green light (GL, 514nm). The IRSL signal's short lifetime (18 days at 15°C) may have been the reason why it was not detected in previous experiments. The decay of the IR signal after GL illumination was observed. The thermoluminescence at 76°C was enhanced after IR illumination.